* {
    box-sizing: border-box;
}

body {
    width: 100%;
    height: 100vh;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: pink;
    font-family: 'Roboto', sans-serif;
    overflow: hidden;
}

.ripple {
    padding: 20px 30px;
    background-color: purple;
    color: #fff;
    font-size: 14px;
    text-transform: uppercase;
    border: none;
    border-radius: 3px;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    -ms-border-radius: 3px;
    -o-border-radius: 3px;
    box-shadow: 0px 3px 5px rgba(0, 0, 0, 0.16), 3px 0 3px rgba(0, 0, 0, 0.23);
    letter-spacing: 2px;
    overflow: hidden;
    margin: 10px 0;
    position: relative;
}

.ripple:focus {
    outline: none;
}

.ripple .circle {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.6);
    width: 100px;
    height: 100px;
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    animation: scale 1s ease-out;
    -webkit-animation: scale 1s ease-out;
    -webkit-transform: translate(-50%, -50%) scale(0);
    -moz-transform: translate(-50%, -50%) scale(0);
    -ms-transform: translate(-50%, -50%) scale(0);
    -o-transform: translate(-50%, -50%) scale(0);
}

@keyframes scale {
    to {
        transform: translate(-50%, -50%) scale(3);
        opacity: 0;
    }
}